Hi Kel, Try this:
eval(parse(text = a)) x Many times (though certainly not all), it may be easier/cleaner to rethink what you are doing (the step before you get a <- "x <- 2^2") to see if there is a simpler way. Cheers, Josh On Tue, Nov 30, 2010 at 2:24 PM, Lamke <lamk...@gmail.com> wrote: > > Hi group, > > I did some searches about this very simple question. Hope someone can help > me out. > > If I have the following: > > a <- "x <- 2^2" > a > [1] "x <- 2^2" > > How do I evaluate the expression that gets me an answer of 4? I tried the > following: > >> eval(a) > [1] "x <- 2^2" >> get(a) > Error in get(a) : object 'x <- 2^2' not found (apparently it's not right!!) > > I have one long string of commands separated by semi-colon and hope to sort > it out. Thank you so much!!! > > Kel > -- > View this message in context: > http://r.789695.n4.nabble.com/Simple-question-on-eval-tp3066346p3066346.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
